A lot of independent chapels are not SSPX - they're just what it says, independent, usually founded by a local group of disgusted Catholics who were unable to get indult masses but did not want to go in with the SSPX. But if they do have to do the latter, at least they know that the SSPX wouldn't force them to have the NO mass.
You seem to be missing the point here. It's about their wish to continue with the Tridentine Rite mass and, in fact, all of the pre-VatII practices, the calendar, etc. Few dioceses (if any) will guarantee them this.
Well the current situation at St. Anthony's does guarntee this. The Chapel is owned by the board members and only the 1962 liturgical rite are to be used at the chapel. Novus Ordo will never be allowed into the chapel, and if the diocse even thinks that its going to attempt to bring Novus Ordo in, the board members can kick the diocese out.
This basic situation played out ten years ago with Our Lady of Fatima Chapel in Pequannock. The Chapel used to be Independent, but then in 1994 the FSSP was given permission by the Diocese to staff the Chapel. In the ten years which Our Lady of Fatim has been under the diocese of Paterson, Novus Ordo has never reared its ugly head at all, and it never will as far as I'm concerned.
The point I was making, was that in the process of determining a course (and if you read the article you probably picked that up) many of those that left, wanted to bring in SSPX.
BUT..... SSPX wanted to run the Parish as a Mission Church, and wanted everything ceded over to them at the end of a two year period.